Heating Oil Tanks in Flemish Property Purchases: Compliance and Soil Risks
Complete guide to domestic fuel oil (mazout) tank inspections in Flanders. What cap colors mean, who pays for tank decommissioning, and OVAM soil liabilities.
Key Takeaways for Property Buyers
- In Flanders, vendors are legally obligated to disclose whether an underground or aboveground fuel oil tank exists and whether it remains in active use.
- A green cap or metal badge signifies full statutory approval; an orange cap permits 6 months for corrective repairs; a red cap strictly prohibits any further fuel delivery due to active leakage hazards.
- Disused underground tanks must by law be emptied, cleaned, and filled with sand or biopolymer foam by a certified technician.
- A leaking oil tank can contaminate surrounding soil, generating environmental remediation bills that easily exceed tens of thousands of euros.
1. What Do the Vlarem II Inspection Caps Mean?
Domestic heating oil tanks must be inspected periodically by an accredited fuel oil technician. Following the pressure and tightness tests, the expert affixes a color-coded cap and tamper-proof metal plate.
Green indicates the tank meets all environmental standards. Orange signals non-critical defects (defective overfill prevention device, non-compliant vent pipe) that must be remedied within 6 months. Red indicates severe structural corrosion or tank perforation; fuel distributors are legally prohibited from refilling a red-capped tank.
Frequently Asked Questions
Can I purchase a home with a red-capped fuel oil tank?
Yes, but stipulate in the compromis that the vendor must decommission and remediate the tank at their sole expense prior to the authentic deed, supported by an official decommissioning certificate.
Relevant documents to request for this subject
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